Shaft-collar.



-- J, MOGAPPREY.

SHAFT COLLAR. APPLICATION FILED NOV. 19, 190B.

Patel lted Apr. 13, 1909.

JOHN MOOAFFREY, OF LAWRENCE, MASSACHUSETTS.

SHAFT-COLLAR.

Application filed November 19, 1908.

Specification of Letters Patent.

To all whom it may concern:

Be it known that 1, JOHN MoCAFFREY, of Lawrence, in the county of Essexand State of Massachusetts, have invented a new and useful Shaft-Collar,of which the following is a specification, reference being had to theaccompanying drawings, forming part thereof.

This invention has reference to improve nients in shaft collars andparticularly to split collars.

The object of the invention is to provide a two part shaft collar whichcan be econom ically manufactured and shall be of strong and durableconstruction and so balanced that it is particularly adapted for useupon high speed shafts while it is capable of being quickly andconveniently ap lied to a shaft.

The invention consists in t e eculiar construction of the parts of thecol ar and their novel combination as shall hereinafter be more fullydescribed and pointed out in the claims.

Figure 1, represents anv isometrical view of the parts of the collar inseparated positions, the securing devices being omitted. Fig. 2,represents a similar view of the same parts in partially closedposition. Fig. 3, represents a similar view of the complete collar theparts of which are brought together and secured from separation by theset screws designed to engage the shaft to which the collar is designedto be a plied.

Simi ar numbers of reference designate corresponding parts throughout.

As shown in the drawings in its preferred form the improved collar isformed in two essentially similar parts which will however, for thepurposes of description, be herein referred to by the different numeralsof reference 5 and 6. Each of said collar sections 5 and 6 comprises theinner wall 7 which is sha ed to conform to a peri heral portion of t eshaft to which the co lar is designed to be secured. In the presentinstance the wall 7 is approximately semicircular and its end portionsare intersected by the flat faces 8 and 9 of the offset arms 10 and 11which arms have the shoulders 12 and 13 preferably extending at an anglewith the axis of the collar and furnished with the semicircular screwthreaded recesses 1414 or key Ways. At the sides of the arms 10 and 11are formed the faces 15 and 16 which extend in planes arallel to therespective faces 8 and 9 of said arms 10 and 11. h

Patented April 13, 1909.

Serial No. 463,405.

,By reason of this construction, when the members 5 and 6 are broughttogether, as shown in Figs. 2 and 3, the faces 88 and 9-9 of therespective arms 1()10and 1 1-1 1 slide over the faces 1515 and 1616 until the related complemental recesses 1414 register, as shown in Fig. 3,at which time the separation of said members 5 and 6 in the direction ofthe axis of the collar is prevented by the shoulders 1212 and 1313 ofthe respective arms 1()-10 and 1111. To prevent the diametricalseparation of such members 5 and 6 set screws 17-17 or keys are nowscrewed into the screw threaded perforations formed by the combinedregistered recesses 14 14 and, if the collar be thus mounted on a shaft,said screws 1717 set against said shaft and revent the rotation of thecollar independentl T of said shaft and, it

is to be noted that, the thrust of the set screws 1717 against the shaftwould be resisted by the bearing of said screws in said recesses i l--14for the full thickness of the collar.

The periphery of the collar, when the members 5 and 6 are assembled asdescribed above, is preferably of cylindrical shape but this shape maybe modified without departing from the spirit of this invention.

The construction of the collar is obviously simple and economical andthe collar is strong and durable and its members 5 and 6 cannot beseparated without the complete shearing of both of the screws 1717. If,therefore, one of the screws 1717 should become loosened and fall outthe parts of the collar would still be held together and fixed on theshaft by the other of said screws; this however, is an eventuality whichis not likely to happen.

Having thus described my invention, I

claim as new and desire to secure by Letters Patent- 1. A split collarcomprising separable members of similar shape having overlappingprojeotions adapted to prevent the independent movement of said membersin the direction of the axis of the collar, and means located betweenthe adjacent faces of saidprojections for preventing diamctricalseparation of said members.

2. A split collar comprising two com plemental members each having apair of onset projections with parallel flat inner faces and a pair ofoffset parallel faces adapted to regeach having a pair of ol'lsetprojections hav ister with the faces of said projections, and 1 formedin the walls of said members, and set 1;":

radially extending securing means located l screws adapted to be screwedinto said screw between said pairs of projections. threaded recesseswhen combined, substan- 3. A split collar comprising two members tiallyas described' 7 ing parallel inner surfaces and sides extend- JOHN MOQABFRED ing at angles with the axis of the collar Witnesses: furnished withcomplemental screw threaded JAMES G. Down, recesses and definingparallel flat surfaces HELEN V. FLEMING.

